package com.atguigu.gulimail.auth.controller;

import com.alibaba.fastjson.TypeReference;
import com.atguigu.common.constant.AuthServerConstant;
import com.atguigu.common.exception.BizCodeEnum;
import com.atguigu.common.utils.R;
import com.atguigu.common.vo.MemberResponseVo;
import com.atguigu.gulimail.auth.feign.MemberFeignService;
import com.atguigu.gulimail.auth.feign.ThirdPartFeignService;
import com.atguigu.gulimail.auth.vo.UserLoginVo;
import com.atguigu.gulimail.auth.vo.UserRegistVo;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import javax.validation.Valid;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

@Controller
public class LoginController {

    @Autowired
    ThirdPartFeignService thirdPartFeignService;

    @Autowired
    StringRedisTemplate redisTemplate;

    @Autowired
    MemberFeignService memberFeignService;

    @ResponseBody
    @GetMapping("/sms/sendcode")
    public R sendCode(@RequestParam("phone") String phone) {

        String redisCode = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
        //  1.接口防刷
        if (!StringUtils.isEmpty(redisCode)) {
            long l = Long.parseLong(redisCode.split("_")[1]);
            if (System.currentTimeMillis() - l < 60000) {
                //  60秒内不能再发

                return R.error(BizCodeEnum.SMS_CODE_EXCEPTION.getCode(), BizCodeEnum.SMS_CODE_EXCEPTION.getMessage());
            }
        }

        //  2.验证码的再次校验。redis，存key-phone，value-code
        String code = UUID.randomUUID().toString().substring(0, 5);
        String subString = code + "_" + System.currentTimeMillis();

        //  redis缓存验证码，防止同一个手机号在60s内再次发送验证码
        redisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone, subString, 10, TimeUnit.MINUTES);

        thirdPartFeignService.sendCode(phone, code);

        return R.ok();
    }

    /**
     * //  TODO    重定向携带数据，利用session原理。将数据放在session中。
     * 只要跳到下一个页面取出这个数据以后，session里面的数据就会删掉
     * <p>
     * //  TODO 1、分布式下的session问题
     * RedirectAttributes redirectAttributes: 模拟重定向携带数据
     *
     * @param vo
     * @param result
     * @param redirectAttributes
     * @return
     */
    @PostMapping("/regist")
    public String regist(@Valid UserRegistVo vo, BindingResult result, RedirectAttributes redirectAttributes) {

        if (result.hasErrors()) {

            /**
             * result.getFieldErrors().stream().map(fieldError -> {
             *                 String field = fieldError.getField();
             *                 String defaultMessage = fieldError.getDefaultMessage();
             *                 errors.put(field,defaultMessage);
             *                 return
             *             })
             */
            Map<String, String> errors = result.getFieldErrors().stream().collect(Collectors.toMap(FieldError::getField, FieldError::getDefaultMessage));
//            model.addAttribute("errors",errors);
            redirectAttributes.addFlashAttribute("errors", errors);
            //  校验出错，转发到注册页
            return "redirect:http://auth.gulimail.com/reg.html";
        }

        //  真正注册，调用远程服务进行注册
        //  1、校验验证码
        String code = vo.getCode();

        String s = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
        if (!StringUtils.isEmpty(s)) {
            if (code.equals(s)) {
                if (!StringUtils.isEmpty(s.split("_")[0])) {
                    //  删除验证码,令牌机制
                    redisTemplate.delete(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());

                    //  验证码通过，真正注册。调用远程服务进行注册
                    R r = memberFeignService.regist(vo);
                    if (r.getCode() == 0) {
                        //  成功
                        Map<String, String> errors = new HashMap<>();
                        errors.put("msg", r.getData("msg", new TypeReference<String>() {
                        }));
                        redirectAttributes.addFlashAttribute("errors", errors);
                        return "redirect:/login.html";
                    } else {
                        return "redirect:http://auth.gulimail.com/reg.html";
                    }

                } else {
                    HashMap<String, String> errors = new HashMap<>();
                    errors.put("code", "验证码错误");
                    redirectAttributes.addFlashAttribute("errors", errors);
                    return "redirect:http://auth.gulimail.com/reg.html";
                }
            }
        } else {
            HashMap<String, String> errors = new HashMap<>();
            errors.put("code", "验证码错误");
            redirectAttributes.addFlashAttribute("errors", errors);
            //  校验出错，转发到注册页
            return "redirect:http://auth.gulimail.com/reg.html";
        }

        //  注册成功，回到首页
        return "redirect:/login.html";
    }

    @GetMapping("/login.html")
    public String loginPage(HttpSession session){
        Object attribute = session.getAttribute(AuthServerConstant.LOGIN_USER);
        if (attribute == null) {
            //  没登录
            return "login";
        } else {
            return "redirect:http://gulimail.com";
        }


    }

    @PostMapping("/login")
    public String login(UserLoginVo vo, RedirectAttributes redirectAttributes,
                        HttpSession session){
        //  远程登录
        R login = memberFeignService.login(vo);
        if (login.getCode() == 0){

            MemberResponseVo data = login.getData("data", new TypeReference<MemberResponseVo>() {
            });
            ////  成功放到session中
            session.setAttribute(AuthServerConstant.LOGIN_USER,data);
            return "redirect:http://gulimail.com";
        }else {
            Map<String,String> errors = new HashMap<>();
            errors.put("msg",login.getData("msg",new TypeReference<String>(){}));
            redirectAttributes.addFlashAttribute("errors",errors);
            return "redirect:http://auth.gulimail.com/login.html";
        }


    }
}
